SiC Balls & Marbles (0.5mm–50mm) | Customizable High-Precision
Bearing Balls
Our silicon carbide (SiC) balls and marbles offer unmatched
hardness, thermal stability, and chemical resistance for
extreme-performance applications. Available in diameters from 0.5mm
to 50mm, these precision-grade spheres are fully customizable.
Ideal for high-speed bearings, semiconductor equipment, aerospace
mechanisms, and corrosive fluid systems, SiC balls outperform
steel, ceramic, and other materials in wear resistance, temperature
tolerance (up to 1950°C), and longevity.
Key Features
✔ Extreme Temperature Resistance – Stable in air (1600°C) and inert
gas (1950°C).
✔ Corrosion Proof – Resists acids, alkalis, and plasma erosion.
✔ Lightweight – Density 3.21 g/cm³ (60% lighter than steel),
reducing centrifugal forces.
✔ Precision Grades – Grade 5-10 (roundness ≤0.1μm, sphericity
≤0.15μm).
✔ Customizable – Adjustable size (±0.1μm), coatings (DLC), and
conductivity (N-doped).
Applications of SiC Ball
1. High-Speed Bearings
- Turbopumps (50,000+ RPM) – SiC’s lightweight and hardness prevent
deformation at extreme speeds.
- EV Motors – Electrically insulating variants eliminate arcing
risks.
2. Semiconductor & Vacuum Equipment
- EUV Lithography Stages – Particle-free, ultra-smooth surfaces (Ra
<0.02μm).
- Wafer Handling Robots – Chemical-resistant for cleanroom
environments.
3. Aerospace & Defense
- Satellite Mechanisms – Vacuum-compatible with zero outgassing.
- Jet Engine Components – Withstands 1,500°C exhaust heat.
4. Industrial & Chemical
- Valve Seals – Resists sulfuric acid, seawater, and high-pressure
fluids.
- Metering Pumps – Maintains precision flow control for abrasive
slurries.
5. Medical Devices
- Surgical Tools – Biocompatible and sterilizable (autoclavable).
- Dental Handpieces – No lubrication needed, reducing
contamination.
Specification
| Silicon Carbide Content | - | % | >99.5 |
| Average Grain Size | - | micron | 4-10 |
| Bulk Density | - | kg/dm^3 | >3.14 |
| Apparent Porosity | - | Vol % | <0.5 |
| Vickers Hardness | HV0.5 | Kg/mm^2 | 2800 |
| Modulus of Rupture (3 points) | 20°C | MPa | 450 |
| Compression Strength | 20°C | MPa | 3900 |
| Modulus of Elasticity | 20°C | GPa | 420 |
| Fracture Toughness | - | MPa/m^1/2 | 3.5 |
| Thermal Conductivity | 20°C | W(m*K) | 160 |
| Electrical Resistivity | 20°C | Ohm.cm | 10^6-10^8 |
| Coefficient of Thermal Expansion | a
(RT"800°C) | K^-1*10^-6 | 4.3 |
| Max. Application Temperature | Oxide Atmosphere | °C | 1600 |
| Max. Application Temperature | Inert Atmosphere | °C | 1950
|
FAQ
Q1: What’s the difference between SiC and silicon nitride (Si₃N₄)
balls?
- SiC: Harder (2800 HV vs. 1500 HV), higher temperature limit
(1950°C vs. 1200°C), but slightly more brittle.
- Si₃N₄: Better fracture toughness for high-impact applications.
Q2: What’s the lead time for custom orders?
- Standard sizes (1–10mm): 2–4 weeks.
- Custom sizes/tolerances: 4–6 weeks.
